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llvm-project/clang/test/OpenMP/irbuilder_for_iterator.cpp

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[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature --include-generated-funcs
// RUN: %clang_cc1 -fopenmp-enable-irbuilder -verify -fopenmp -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
// expected-no-diagnostics
#ifndef HEADER
#define HEADER
struct MyIterator {
MyIterator(unsigned pos);
MyIterator(const MyIterator &other);
const MyIterator &operator=(const MyIterator &that);
MyIterator &operator++();
int operator-(const MyIterator &that) const;
MyIterator &operator+=(unsigned a);
MyIterator operator+(unsigned a) const;
bool operator==(const MyIterator &that) const;
bool operator!=(const MyIterator &that) const;
unsigned operator*() const;
};
extern "C" void workshareloop_iterator(float *a, float *b, float *c) {
#pragma omp for
for (MyIterator it = MyIterator(7); it != MyIterator(41); ++it) {
unsigned i = *it;
a[i] = b[i] * c[i];
}
}
#endif // HEADER
// CHECK-LABEL: define {{[^@]+}}@workshareloop_iterator
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-SAME: (float* [[A:%.*]], float* [[B:%.*]], float* [[C:%.*]]) [[ATTR0:#.*]] {
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: entry:
// CHECK-NEXT: [[A_ADDR:%.*]] = alloca float*, align 8
// CHECK-NEXT: [[B_ADDR:%.*]] = alloca float*, align 8
// CHECK-NEXT: [[C_ADDR:%.*]] = alloca float*, align 8
// CHECK-NEXT: [[IT:%.*]] = alloca [[STRUCT_MYITERATOR:%.*]], align 1
// CHECK-NEXT: [[AGG_CAPTURED:%.*]] = alloca [[STRUCT_ANON:%.*]], align 8
// CHECK-NEXT: [[AGG_CAPTURED1:%.*]] = alloca [[STRUCT_ANON_0:%.*]], align 1
// CHECK-NEXT: [[DOTCOUNT_ADDR:%.*]] = alloca i64, align 8
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[P_LASTITER:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[P_LOWERBOUND:%.*]] = alloca i64, align 8
// CHECK-NEXT: [[P_UPPERBOUND:%.*]] = alloca i64, align 8
// CHECK-NEXT: [[P_STRIDE:%.*]] = alloca i64, align 8
// CHECK-NEXT: store float* [[A]], float** [[A_ADDR]], align 8
// CHECK-NEXT: store float* [[B]], float** [[B_ADDR]], align 8
// CHECK-NEXT: store float* [[C]], float** [[C_ADDR]], align 8
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: call void @_ZN10MyIteratorC1Ej(%struct.MyIterator* nonnull dereferenceable(1) [[IT]], i32 7)
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[STRUCT_ANON]], %struct.anon* [[AGG_CAPTURED]], i32 0, i32 0
// CHECK-NEXT: store %struct.MyIterator* [[IT]], %struct.MyIterator** [[TMP0]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_ANON_0]], %struct.anon.0* [[AGG_CAPTURED1]], i32 0, i32 0
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: call void @_ZN10MyIteratorC1ERKS_(%struct.MyIterator* nonnull dereferenceable(1) [[TMP1]], %struct.MyIterator* nonnull align 1 dereferenceable(1) [[IT]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: call void @__captured_stmt(i64* [[DOTCOUNT_ADDR]], %struct.anon* [[AGG_CAPTURED]])
// CHECK-NEXT: [[DOTCOUNT:%.*]] = load i64, i64* [[DOTCOUNT_ADDR]], align 8
// CHECK-NEXT: br label [[OMP_LOOP_PREHEADER:%.*]]
// CHECK: omp_loop.preheader:
// CHECK-NEXT: store i64 0, i64* [[P_LOWERBOUND]], align 8
// CHECK-NEXT: [[TMP2:%.*]] = sub i64 [[DOTCOUNT]], 1
// CHECK-NEXT: store i64 [[TMP2]], i64* [[P_UPPERBOUND]], align 8
// CHECK-NEXT: store i64 1, i64* [[P_STRIDE]], align 8
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: [[OMP_GLOBAL_THREAD_NUM:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* [[GLOB1:@.*]])
// CHECK-NEXT: call void @__kmpc_for_static_init_8u(%struct.ident_t* [[GLOB1]], i32 [[OMP_GLOBAL_THREAD_NUM]], i32 34, i32* [[P_LASTITER]], i64* [[P_LOWERBOUND]], i64* [[P_UPPERBOUND]], i64* [[P_STRIDE]], i64 1, i64 1)
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: [[TMP3:%.*]] = load i64, i64* [[P_LOWERBOUND]], align 8
// CHECK-NEXT: [[TMP4:%.*]] = load i64, i64* [[P_UPPERBOUND]], align 8
// CHECK-NEXT: [[TMP5:%.*]] = sub i64 [[TMP4]], [[TMP3]]
// CHECK-NEXT: [[TMP6:%.*]] = add i64 [[TMP5]], 1
// CHECK-NEXT: br label [[OMP_LOOP_HEADER:%.*]]
// CHECK: omp_loop.header:
// CHECK-NEXT: [[OMP_LOOP_IV:%.*]] = phi i64 [ 0, [[OMP_LOOP_PREHEADER]] ], [ [[OMP_LOOP_NEXT:%.*]], [[OMP_LOOP_INC:%.*]] ]
// CHECK-NEXT: br label [[OMP_LOOP_COND:%.*]]
// CHECK: omp_loop.cond:
// CHECK-NEXT: [[OMP_LOOP_CMP:%.*]] = icmp ult i64 [[OMP_LOOP_IV]], [[TMP6]]
// CHECK-NEXT: br i1 [[OMP_LOOP_CMP]], label [[OMP_LOOP_BODY:%.*]], label [[OMP_LOOP_EXIT:%.*]]
// CHECK: omp_loop.body:
// CHECK-NEXT: [[TMP7:%.*]] = add i64 [[OMP_LOOP_IV]], [[TMP3]]
// CHECK-NEXT: call void @__captured_stmt.1(%struct.MyIterator* [[IT]], i64 [[TMP7]], %struct.anon.0* [[AGG_CAPTURED1]])
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: [[CALL:%.*]] = call i32 @_ZNK10MyIteratordeEv(%struct.MyIterator* nonnull dereferenceable(1) [[IT]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: store i32 [[CALL]], i32* [[I]], align 4
// CHECK-NEXT: [[TMP8:%.*]] = load float*, float** [[B_ADDR]], align 8
// CHECK-NEXT: [[TMP9:%.*]] = load i32, i32* [[I]], align 4
// CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[TMP9]] to i64
// CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[TMP8]], i64 [[IDXPROM]]
// CHECK-NEXT: [[TMP10:%.*]] = load float, float* [[ARRAYIDX]], align 4
// CHECK-NEXT: [[TMP11:%.*]] = load float*, float** [[C_ADDR]], align 8
// CHECK-NEXT: [[TMP12:%.*]] = load i32, i32* [[I]], align 4
// CHECK-NEXT: [[IDXPROM2:%.*]] = zext i32 [[TMP12]] to i64
// CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[TMP11]], i64 [[IDXPROM2]]
// CHECK-NEXT: [[TMP13:%.*]] = load float, float* [[ARRAYIDX3]], align 4
// CHECK-NEXT: [[MUL:%.*]] = fmul float [[TMP10]], [[TMP13]]
// CHECK-NEXT: [[TMP14:%.*]] = load float*, float** [[A_ADDR]], align 8
// CHECK-NEXT: [[TMP15:%.*]] = load i32, i32* [[I]], align 4
// CHECK-NEXT: [[IDXPROM4:%.*]] = zext i32 [[TMP15]] to i64
// CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds float, float* [[TMP14]], i64 [[IDXPROM4]]
// CHECK-NEXT: store float [[MUL]], float* [[ARRAYIDX5]], align 4
// CHECK-NEXT: br label [[OMP_LOOP_INC]]
// CHECK: omp_loop.inc:
// CHECK-NEXT: [[OMP_LOOP_NEXT]] = add nuw i64 [[OMP_LOOP_IV]], 1
// CHECK-NEXT: br label [[OMP_LOOP_HEADER]]
// CHECK: omp_loop.exit:
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: call void @__kmpc_for_static_fini(%struct.ident_t* [[GLOB1]], i32 [[OMP_GLOBAL_THREAD_NUM]])
// CHECK-NEXT: [[OMP_GLOBAL_THREAD_NUM6:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* [[GLOB1]])
// CHECK-NEXT: call void @__kmpc_barrier(%struct.ident_t* [[GLOB2:@.*]], i32 [[OMP_GLOBAL_THREAD_NUM6]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: br label [[OMP_LOOP_AFTER:%.*]]
// CHECK: omp_loop.after:
// CHECK-NEXT: ret void
//
//
// CHECK-LABEL: define {{[^@]+}}@__captured_stmt
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-SAME: (i64* nonnull align 8 dereferenceable(8) [[DISTANCE:%.*]], %struct.anon* noalias [[__CONTEXT:%.*]]) [[ATTR2:#.*]] {
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: entry:
// CHECK-NEXT: [[DISTANCE_ADDR:%.*]] = alloca i64*, align 8
// CHECK-NEXT: [[__CONTEXT_ADDR:%.*]] = alloca %struct.anon*, align 8
// CHECK-NEXT: [[DOTSTART:%.*]] = alloca [[STRUCT_MYITERATOR:%.*]], align 1
// CHECK-NEXT: [[DOTSTOP:%.*]] = alloca [[STRUCT_MYITERATOR]], align 1
// CHECK-NEXT: [[DOTSTEP:%.*]] = alloca i64, align 8
// CHECK-NEXT: store i64* [[DISTANCE]], i64** [[DISTANCE_ADDR]], align 8
// CHECK-NEXT: store %struct.anon* [[__CONTEXT]], %struct.anon** [[__CONTEXT_ADDR]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load %struct.anon*, %struct.anon** [[__CONTEXT_ADDR]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_ANON:%.*]], %struct.anon* [[TMP0]], i32 0, i32 0
// CHECK-NEXT: [[TMP2:%.*]] = load %struct.MyIterator*, %struct.MyIterator** [[TMP1]], align 8
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: call void @_ZN10MyIteratorC1ERKS_(%struct.MyIterator* nonnull dereferenceable(1) [[DOTSTART]], %struct.MyIterator* nonnull align 1 dereferenceable(1) [[TMP2]])
// CHECK-NEXT: call void @_ZN10MyIteratorC1Ej(%struct.MyIterator* nonnull dereferenceable(1) [[DOTSTOP]], i32 41)
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: store i64 1, i64* [[DOTSTEP]], align 8
// CHECK-NEXT: [[TMP3:%.*]] = load i64, i64* [[DOTSTEP]], align 8
// CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[TMP3]], 0
// CHECK-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
// CHECK: cond.true:
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: [[CALL:%.*]] = call i32 @_ZNK10MyIteratormiERKS_(%struct.MyIterator* nonnull dereferenceable(1) [[DOTSTART]], %struct.MyIterator* nonnull align 1 dereferenceable(1) [[DOTSTOP]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: [[CONV:%.*]] = sext i32 [[CALL]] to i64
// CHECK-NEXT: [[TMP4:%.*]] = load i64, i64* [[DOTSTEP]], align 8
// CHECK-NEXT: [[SUB:%.*]] = sub i64 0, [[TMP4]]
// CHECK-NEXT: [[DIV:%.*]] = udiv i64 [[CONV]], [[SUB]]
// CHECK-NEXT: br label [[COND_END:%.*]]
// CHECK: cond.false:
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: [[CALL1:%.*]] = call i32 @_ZNK10MyIteratormiERKS_(%struct.MyIterator* nonnull dereferenceable(1) [[DOTSTOP]], %struct.MyIterator* nonnull align 1 dereferenceable(1) [[DOTSTART]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: [[CONV2:%.*]] = sext i32 [[CALL1]] to i64
// CHECK-NEXT: [[TMP5:%.*]] = load i64, i64* [[DOTSTEP]], align 8
// CHECK-NEXT: [[DIV3:%.*]] = udiv i64 [[CONV2]], [[TMP5]]
// CHECK-NEXT: br label [[COND_END]]
// CHECK: cond.end:
// CHECK-NEXT: [[COND:%.*]] = phi i64 [ [[DIV]], [[COND_TRUE]] ], [ [[DIV3]], [[COND_FALSE]] ]
// CHECK-NEXT: [[TMP6:%.*]] = load i64*, i64** [[DISTANCE_ADDR]], align 8
// CHECK-NEXT: store i64 [[COND]], i64* [[TMP6]], align 8
// CHECK-NEXT: ret void
//
//
// CHECK-LABEL: define {{[^@]+}}@__captured_stmt.1
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-SAME: (%struct.MyIterator* nonnull align 1 dereferenceable(1) [[LOOPVAR:%.*]], i64 [[LOGICAL:%.*]], %struct.anon.0* noalias [[__CONTEXT:%.*]]) [[ATTR2]] {
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: entry:
// CHECK-NEXT: [[LOOPVAR_ADDR:%.*]] = alloca %struct.MyIterator*, align 8
// CHECK-NEXT: [[LOGICAL_ADDR:%.*]] = alloca i64, align 8
// CHECK-NEXT: [[__CONTEXT_ADDR:%.*]] = alloca %struct.anon.0*, align 8
// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_MYITERATOR:%.*]], align 1
// CHECK-NEXT: store %struct.MyIterator* [[LOOPVAR]], %struct.MyIterator** [[LOOPVAR_ADDR]], align 8
// CHECK-NEXT: store i64 [[LOGICAL]], i64* [[LOGICAL_ADDR]], align 8
// CHECK-NEXT: store %struct.anon.0* [[__CONTEXT]], %struct.anon.0** [[__CONTEXT_ADDR]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load %struct.anon.0*, %struct.anon.0** [[__CONTEXT_ADDR]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_ANON_0:%.*]], %struct.anon.0* [[TMP0]], i32 0, i32 0
// CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* [[LOGICAL_ADDR]], align 8
// CHECK-NEXT: [[MUL:%.*]] = mul i64 1, [[TMP2]]
// CHECK-NEXT: [[CONV:%.*]] = trunc i64 [[MUL]] to i32
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: call void @_ZNK10MyIteratorplEj(%struct.MyIterator* sret(%struct.MyIterator) align 1 [[REF_TMP]], %struct.MyIterator* nonnull dereferenceable(1) [[TMP1]], i32 [[CONV]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: [[TMP3:%.*]] = load %struct.MyIterator*, %struct.MyIterator** [[LOOPVAR_ADDR]], align 8
Temporairly revert "[CGCall] Annotate `this` argument with alignment" As per @jyknight, "It seems like there's a bug with vtable thunks getting the wrong information." See https://reviews.llvm.org/D99790#2680857, https://godbolt.org/z/MxhYMe1q7 This reverts commit 0aa0458f1429372038ca6a4edc7e94c96cd9a753.
2021-04-10 15:41:16 +08:00
// CHECK-NEXT: [[CALL:%.*]] = call nonnull align 1 dereferenceable(1) %struct.MyIterator* @_ZN10MyIteratoraSERKS_(%struct.MyIterator* nonnull dereferenceable(1) [[TMP3]], %struct.MyIterator* nonnull align 1 dereferenceable(1) [[REF_TMP]])
[clang][OpenMP] Use OpenMPIRBuilder for workshare loops. Initial support for using the OpenMPIRBuilder by clang to generate loops using the OpenMPIRBuilder. This initial support is intentionally limited to: * Only the worksharing-loop directive. * Recognizes only the nowait clause. * No loop nests with more than one loop. * Untested with templates, exceptions. * Semantic checking left to the existing infrastructure. This patch introduces a new AST node, OMPCanonicalLoop, which becomes parent of any loop that has to adheres to the restrictions as specified by the OpenMP standard. These restrictions allow OMPCanonicalLoop to provide the following additional information that depends on base language semantics: * The distance function: How many loop iterations there will be before entering the loop nest. * The loop variable function: Conversion from a logical iteration number to the loop variable. These allow the OpenMPIRBuilder to act solely using logical iteration numbers without needing to be concerned with iterator semantics between calling the distance function and determining what the value of the loop variable ought to be. Any OpenMP logical should be done by the OpenMPIRBuilder such that it can be reused MLIR OpenMP dialect and thus by flang. The distance and loop variable function are implemented using lambdas (or more exactly: CapturedStmt because lambda implementation is more interviewed with the parser). It is up to the OpenMPIRBuilder how they are called which depends on what is done with the loop. By default, these are emitted as outlined functions but we might think about emitting them inline as the OpenMPRuntime does. For compatibility with the current OpenMP implementation, even though not necessary for the OpenMPIRBuilder, OMPCanonicalLoop can still be nested within OMPLoopDirectives' CapturedStmt. Although OMPCanonicalLoop's are not currently generated when the OpenMPIRBuilder is not enabled, these can just be skipped when not using the OpenMPIRBuilder in case we don't want to make the AST dependent on the EnableOMPBuilder setting. Loop nests with more than one loop require support by the OpenMPIRBuilder (D93268). A simple implementation of non-rectangular loop nests would add another lambda function that returns whether a loop iteration of the rectangular overapproximation is also within its non-rectangular subset. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D94973
2021-03-04 07:15:32 +08:00
// CHECK-NEXT: ret void
//